The Case for Practicing Response Before You Need It

TL;DR: Building a security program and exercising it are not the same investment. Most organizations prioritize the first and defer the second. This post explains what structured practice requires and why it belongs in every mature security program. 

Most security teams have runbooks, escalation procedures, and documented response processes. Far fewer have practiced executing those processes under realistic conditions. Most organizations don’t see this gap until an actual incident forces it into view.  

As an example: in our consulting work, we’ve seen client security teams identify malicious command and control traffic generated by our red team, but their process for blocking the domain took 24 to 48 hours to execute. By then, our red team had already moved to a new domain and continued operating undetected. The detection worked. The response process didn’t hold under real conditions. 

A playbook that has never been exercised is a hypothesis. A response team that has never worked through a simulated attack carries untested assumptions about how it will perform during a real incident. 

Detection and response is a performance discipline, where capability comes from repetition and structured reflection, not documentation alone. This piece explains the distinction between measuring response capability and developing it through structured practice. 

If you haven’t read our first post on how SpecterOps approaches red teaming, that piece covers the foundational philosophy behind our work. Here, we’ll go a level deeper. 

Performance under pressure has to be built 

In fields where performance under pressure matters, structured practice is standard. 

Pilots return to simulators throughout their careers to demonstrate they can handle emergencies they may rarely encounter in the air. Military units run exercises continuously, not just before deployment, because coordination and decision-making under pressure degrade without regular use. Surgical teams rehearse crisis scenarios routinely, for the same reason. 

None of these fields assume that documented procedures translate into execution capability. They build and maintain it deliberately. 

Security programs have invested in preparedness — tabletops, documented playbooks, cross-team training. The intent is right, but familiarity with a scenario is not the same as having executed it under pressure. 

Two activities, two different outcomes 

A Red Team Engagement and a Red Team Exercise produce fundamentally different outcomes. The distinction is worth understanding before deciding which one your program needs. 

A Red Team Engagement simulates an adversary operating independently and, where possible, without defender awareness. It tests whether detection and response capabilities work under realistic conditions. Findings reveal gaps, but the engagement itself is not designed to close them. This is measurement. 

A Red Team Exercise operates with defenders fully engaged. Participants know the simulation is happening and are expected to respond in real time. Scenarios are designed around specific capabilities the team needs to build, and mistakes are expected because they create the opportunity to learn. A team that has never made a containment decision under pressure, coordinated a response across functions, or executed an escalation in real time is carrying untested assumptions into every incident. This is structured practice. 

Most organizations invest regularly in measurement. Structured practice is a different conversation, one that happens less often and easily gets deprioritized. 

What structured practice requires 

The core skills that determine response effectiveness can be trained: recognizing attacker behavior in telemetry, coordinating across teams under time pressure, making containment decisions with incomplete information, and knowing when to escalate and when to act.  

But not all exercises develop those skills. A tabletop builds conceptual familiarity but not the procedural competence that matters when an incident is real. Effective structured practice requires: 

• Defined learning objectives: specific capabilities tied to each phase of the exercise, not broad or generic goals 

• Realistic stimulus: adversary activity that forces defenders to make real decisions with incomplete information. Scripted walkthroughs have value at earlier maturity stages, but they stop short of developing the decision-making required during active response 

• Active participation: responders fully engaged throughout, not half-watching while doing other work 

• Structured reflection: daily debriefs during the exercise and a retrospective at the close to review what happened, what worked, and what needs to change 

• Safe-to-fail conditions: room to make mistakes without production impact. Without this, participants optimize for looking competent rather than learning 

And, defining success metrics before the exercise begins gives the after-action review something concrete to measure against. Detection timelines, response accuracy, and containment decisions are some example measurable outputs that go beyond qualitative observation alone. Capturing those outputs accurately requires a control cell — a neutral coordination team that oversees the exercise, facilitates communication between the adversary and defenders, and maintains an objective record of what occurred. Without a neutral account, after-action reviews often become debates about what happened instead of discussions about what to improve.  

When practice is most valuable 

The highest-value exercise scenarios usually follow meaningful operational change, including when the team has:  

• Deployed new detection or response capabilities that haven’t been tested under pressure 

• Rebuilt or reorganized the response team and needs to establish whether the group is ready to respond effectively 

• Addressed gaps identified in a prior incident or assessment 

• Documented response processes that have never been executed end-to-end 

In each case, the program has something to test and something to build.  

In our red team engagements, we’ve seen well-intentioned containment decisions create new problems. In one case, a client’s response to suspicious cloud storage traffic was to block the service entirely. The decision made sense in isolation. What the team hadn’t tested was the downstream impact and the block disrupted enough business operations that it had to be reversed while a more targeted approach was scoped. The gap wasn’t in awareness or intent, but rather in a containment process that had never been operationally tested. Safe-to-fail scenarios in a structured exercise exist precisely so that kind of discovery happens in practice, not during an actual incident. 

Exercises also provide something harder to quantify: confidence that the team can respond effectively under pressure. Documentation can describe readiness. Only execution can prove it. 

Mature security programs treat practice as an ongoing investment. The organizations that get the most out of it have done the work to understand their attack surface; they know what they’re defending and where they’re most exposed. Most security leaders can speak to how well their program has been assessed. The harder question is how well their team has practiced responding under realistic conditions. 

Up next: how to design red team objectives that drive results 

For teams planning a red team engagement or exercise, the value you get depends heavily on how objectives are defined before work begins. In our next post in this series, we’ll explore what separates well-designed objectives from poorly-designed ones, and how to scope engagements that produce actionable results.